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Imperfect integration: Congruency between multiple sensory sources modulates decision-making processes.

Dominik Krzemiński1,2, Jiaxiang Zhang3

  • 1Cardiff University Brain Research Imaging Centre, School of Psychology, Cardiff University, Cardiff, UK. dkk33@cam.ac.uk.

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Summary
This summary is machine-generated.

Making decisions with multiple information sources can reduce accuracy. This study used cognitive and neural modeling to show that adding a second source impacts evidence accumulation and decision strategies, depending on information congruency.

Keywords:
AttentionCognitive modelDecision-makingMultiple sourcesNeural-mass modelSpeed–accuracy trade-off

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Area of Science:

  • Cognitive Neuroscience
  • Computational Neuroscience
  • Decision Science

Background:

  • Human decision-making often involves integrating information from multiple sources.
  • The precise neurocognitive mechanisms and behavioral consequences of using multiple versus single information sources remain incompletely understood.

Purpose of the Study:

  • To characterize the neurocognitive processes of perceptual decision-making using single versus double information sources.
  • To investigate how the congruency of multiple information sources affects decision-making strategies and outcomes.

Main Methods:

  • Combined cognitive modeling and neural-mass modeling approaches.
  • Utilized behavioral data from 94 human participants performing a binary motion direction discrimination task with one or two apertures.

Main Results:

  • Decision accuracy decreased when motion information was separated into two apertures, irrespective of their angular separation.
  • Modeling suggested a reduced signal-to-noise ratio in evidence accumulation with congruent dual sources.
  • Incongruent dual sources led to altered speed-accuracy trade-off strategies.

Conclusions:

  • The introduction of a second information source robustly alters perceptual decision-making behavior.
  • The impact of multiple information sources is congruency-dependent, affecting specific subcomponents of selective decision-making.